The delta variant is fueling the COVID-19 surge in the United States, but experts warn that a more dangerous variant could emerge if more Americans don't get vaccinated. Delta is the most recent of ...

Differing strains of the coronavirus continue to appear around the world and a new COVID-19 variant, the so-called "Delta" variant, has health experts concerned. The variant, otherwise known as B.1617 ...

The delta coronavirus variant surging across the United States appears to cause more severe illness and spread as easily as chickenpox, according to an internal document from the US Centers for ...

SAN FRANCISCO (KGO) -- Bay Area doctors and health officials are concerned about the rapid spread of the COVID-19 Delta variant, warning significant outbreaks could trigger a setback for the state.

CHICAGO (WLS) -- Work being done inside a UIC lab will hopefully lead to more information about various strains of COVID-19, including the Delta variant. "What we want to know is how fast these ...

As the delta variant continues to spread in countries around the world, some COVID-19 safety restrictions have been reinstated in efforts to curb the rising cases. But the director of the U.S. Centers ...

One thing we know for sure about SARS-CoV-2, the virus that causes COVID-19, is that it keeps changing. Since the start of the pandemic, we have seen several notable variants, including Alpha, Beta, ...

Moderna on Tuesday released preliminary data indicating its vaccine is likely to hold up against several variants of concern, including the Delta variant, which is predicted to become the dominant ...